Vivitar 550FD / C/R User manual

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Mike
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Date:   DN:Digitally
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      by
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DESCRTPTTON OF COnrhOls
1. Flash Head/Reflector j
2. Adjustable Bounce Head (0o, 45o, 60", 75o and
90 ")
3. Mounting Foot with Locking Wheel "
4. Light Sensor rr
5. Battery Compartment Cover
6. Bounce Angle Indicator
7. ISO Film Speed Scate
8. Film Speed Window
9. Film Speed Setector
10. Auto Exposure Range Window
1 1. Mode Selector
. 12. Manual f/Stop/Distance Scales
13. Flash Ready Light/Ftash Test Button lrl

I 14. Auto OK Indicator 'i
1 5. Power ON/OFF Switch
16. Auto f /Stop Window
. NOTE:
The 550FD is available in 3 separate models by
camera brand and is tully dedicated to most popular
SLR cameras. The 3 models are CR for Canon and
Ricoh, N for all Nikon models, and MpO for Minolta,
Pentax and Olympus. Make sure the S50FD model
you have malches lhe camera brand you are
using.
HERE IT IS
The Vivitar 550FD has been designed to offer the
easiest posslble use in obtaining quality flash
pictures. This section of the instruclron manuat ts
designed to show you the basic operation of this unit
Detailed instructions for use with your camera model
follow this basic section

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Auto f/Stop Window (1ti) and Auto Exposure Range
Window (10) will be blank. However, the Manual
Distance Scale (12) will indicate a range of  f /stops
between the feet and meter scales. To use this
scale, determine your flash-to-sublect distance and
note the f/stop opposite this distance on the scale.
Set'your camera lens to this  f /stop to make your
exposure. For proper exposure in the manual mode,
you must select a different f/stop setting as you
change flash-to-subject distances.
When the Mode Selector is set to the TTL position
(for Nikon owners, the M/TTL position), automatic
exposure  will be determined by the camera melering
system. The Auto Exposure Range Window (10) and
the Auto  f /Stop Window (16) will be blank. To
determine the maximum auto exposure distance for
TTL, observe the distance on the Manual Distance
Scale (12) opposite the  f /stop you have chosen, or
check the TTL f/Stoo Distance Chart at the rear of
this manual.
Note lor 550FD Canon/Ricoh model users: In the
R/TTL position, the 550FD performs most dedicated
functions on the Ricoh XR-P camera, including TTL
and aulo fill-flash. The R/TTL setting has no function
 for Canon cameras and when flashed in that setting
on a Canon camera, the 550FD produces a full
 power manual flash without automatic exposure.
 6. AUTO OK INDICATOR (Sulficient Light
 lndicator)
 The Auto OK Indicator (14) operates only in the A1,
A2 and TTL auto settings. The Auto OK Indicator
 confirms that your subject will be correctly exposed.
 For proper use of the Auto OK Indicator at the Al or
A2 setlings, aim the flash at your key subject and
 press the Flash Test Button (13) while watching the
 Auto OK Indicator. The Auto OK will light up and
 glow green  if the subject is within the auto range.  lf
 no green light is seen, reduce your flash-to-subject
 distance, or if you are using A2 switch to A1.

A

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When using the TTL setting the Auto OK will only
work if an actual exposure is made with the flast-r
attached to the camera, In that case film must oe
loaded in the camera. Or, for test purposes, a lioht-
toned piece of paper should be positioned at th; film
plane as a film substitute and lhe camera back must
be closed. Please note that light-toned paper may
give incorrect responses due to its difference in
reflective quality versus actual film. In either case, an
actual flash "exposure" must be made by depressino
the camera shutter release button.

7. BOUNCE FLASH
By bouncing" flash off reflective surfaces such as
the ceiling, subjects can be more soffly lighted. Avoid
colored reflective surfaces when using color film,
since bounced light will be influenced by such
colors. affecting results accordingly To determine
correct operattng range under '.bounce" conditions, /check the Auto OK Indicator explained above
8. DEDICATED FUNCTIONS
Please refer to the Specific Dedicated Function
Instructions section for your parlicular camera brand
and model.
9. TO TAKE A PICTURE
Once you have gone through the familiarization
procedure described above, you will understand the
workings of the flash unrt well enough to begin to
utrlze its great potential. However, the following
checklist is provided as a convenient reference for
the picture-taking procedure.
a) Load camera with film and set the film speed.
b) With flash power OFF, mount flash on camera
and turn lock ring down against shoe. Flash snoe
must be securely locked on camera to prevent
intermittent contact and malfunction.

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c) Sel camera to automatic mode or X-sync speed.
   (On most modern 35mm SLR cameras with
   dedicated function, your 550FD will make the
    setting for you, automalically.)
d) Set film speed on flash unit.
e) Sel flash.Power Switch to ON.
 f) Set flash Mode Selector to mode desired.
g) lf necessary sel requrred f/stop on your camera
    lens.
h) Focus, compose the picture, and shoot.
10. USE OF OPTIONAL COLOR FILTERS
The optional color filters should be used only with
the flash set to the Manual mode. The following chart
is provided as a guide only Specific data may vary
as you adapt filtered-flash to your creative style.
Experimentation  is highly recommended.

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GENERAL SPECIFICATIONS
 Guide Number (lSO 100) ISO/ft    DIN/m
 Basic flash             80 (50mm) 24 (50mm)
 Angle of Coverage:34" x 46"
 Power Source; 4 AA alkaline or NiCad batteries
 Recycle Time, Average
 (with 4 AA alkaline):
 Auto: 0.5-4.0 sec.
 Manual: 4.0 sec.
  ( w ith  .f u  t ty c ha rged NlOads/;
 Auto: 0.5-3.0 sec.
 Manual: 3.0 sec.
 Number of Flashes, Average
 (with 4 AA alkaline):
 Aulo:450-1800
 Manual: 450
 (with tully charged NiCads):
 Auto; 200-750
 Manual: 200
 Auto C   i rc u it; Thyristor
 Automatic f/Stops and Corresponding Auto
 Exposure Flash Ranges with tSO.100 Film:
 A1 (Il2):6-40  ft (2.0-12 m)
 A2  (I I 4)'.3-20  ft (1 .0-6 m)
 (For TTL operation, see the TTL f/Stop/Distance
 Chart at the rear of this manual.)
 Sensor Measuring Angle: Approx. 180
 Flash Duration:
 Manual:  1 /1,000 sec.
 Auto: 1 /1.000-1 /30.000 sec.
 Auto OK Circuit: Green lamp, extended on-time
 Flash Ready Light: Orange neon tube
 F/ash fest Button:Combined  with Flash Readv
 Light
 Col or Te m per at u re: 6000" Kelvin
 Calculator Sca/e: ISO 64, 100,200,400, 1000, 1600

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Hot Shoe: Locking,fiilfi mdicated contacts
Vertical Bouncing:0, 45, 60, 75 and 90o
Dedicated Functions: Variable per camera (see
specific camera/flash  instruction section)
O pt  i on al Accessories.'
Wide Angle Lens and Color Filter Kit

Specifications subject to change without notice.

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SPECIFIC DEDICATED
FUNCTION INSTRUCTIONS
CANON AE-l WITH 55OFD
(FLASH POWER SWITCH MUST BE IN THE OFF
POSITION BEFORE MOUNTING FLASH ON OR
REMOVING FROM CAMERA.)

AUTOMATIC OPERATION
1. Film Speed the ASA/fSO Setting for the - Set film in use on flash. both camera and
On-Camera Mode 2. and Shutter Dial Setting - "8". Set to any speed except
On-Flash 3. Mode Selector
best flash performance, use- A1Setwheneverto A1 or A2. For
oossible.
NOTE: The R-TTL position is for Ricoh cameras. lf
used on Canon cameras, it will result in fulr
manual output of flash and will in no way
adversely affect your Canon camera.
4. Setting Lens f /stop
past indicator minimum- Setf/stop.to green "A" or green
5. Turn flash on and when the ready light glows
shutter and f/stop are automatically set for flash.
Take the picture.
Viewf 6. inder lnformation
is depressed halfway, lens- isWhenautomaticallyshutter releaseset
and needle points to the f /stop shown in the
Automatic f /stop Window on the back of the flash.
(AUTO Exposure 7. Auto Verification OK)
exposure is verified green by glowing "AUTO- AutoOK"
on the back of the flash. To activate the "AUTO
OK", take a flash picture or push the
"READY/TEST" BUTTON on the back of the
flash. Check the "AUTO OK" immediatelv after
the flash fires. lf no "AUTO OK" and using A2,
move closer to the subject or switch to A1. lf no
"AUTO OK" with Al, move closer to subiect.
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MANUAL OPERATION
For Manual Flash Output, simply set Flash Mode
Selector to "M". After focusing, obtain sublecl
distance from lens barrel. Find this distance on
Manu'at f/stop/Distance Scale on the back of the
flash. Set your lens to the f /stop opposite the
dislance. "AUTO OK" does not function when flash
is in the manual mode
CANON AE-l PROGRAM
WITH 55OFD
(FLASH POWER SWITCH MUST BE IN THE OFF
POSITION BEFORE MOUNTING FLASH ON OR
REMOVING FROM CAMERA.)
AUTOMATIC OPERATION
1. Film speed setting
film in use on both camera- set andthe ASA/lsoflash. for the
2. On-Camen Mode Shutter and Dial Setting - Set to "Program" or any shutter speed.
On-Flash3. Mode Selector Set to 41 or A2. For - best flash performance, A1 use whenever
possible.
NOTE: The R-TTL position is for Ricoh cameras. lf
used on Canon cameras, il will result in full
manual output of flash and will in no wav
adversely affect your Canon camera.
4. Lens f/stop Setting
indicator past minimum- Setf/stop.to green "A" or green
5. Turn flash on and when the ready light glows
shutter and f/stop are automatically set for flash.
Take the picture.
Viewtinder6. lnformation
rs depressed halfway, lens- isWhenautorhaticallvshutter releaseset
and LED displays the same f/slop shown in the
Automatic f /stop Window on the back of the flash.
A green lightning bolt is also displayed and
indicates flash ready.
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(AUTO Exposure Verification7. Auto OK) - AIIer Release the prcture, taking keep the Shutter
depressed and note the green lightning bolt in the'"
viewfinder lf the lightning bolt blinks, it indicates
enough light was produced for a good exposure.
Auto exposure verification is also indicated by the
glowing green "AUTO OK" on the back of the
flash lt can be activated by taking a picture or by
depressing the "READY/TEST" BUTTON on the
back of the flash Check the "AUTO OK"
immediately after the f lash fires. lf no 'AUTO OK"
and using.A2, move closer to the subject or .?
switch to A1 lf no 'AUTO OK' with 41, move
closer lo sublect.

MANUAL OPERATION
For Manual Ftash Outpuf, simply set Flash Mode
Selector to "M". After focusing, obtain subject x
distance from lens barrel. Find this distance on
Manual f/stoo/Distance Scale on the back of the
flash. Set your lens to the f /stop opposite the
distance. 'AUTO OK" does not function when flash
is in the manual mode.
CANON A-1 WITH 55OFD
(FLASH POWER SWITCH MUST BE IN THE OFF
POSITION BEFORE MOUNTING FLASH ON OR
REMOVING FROM CAMERA.)

AUTOMATIC OPERATION
1. Film Speed Setting
in use on - Set andthe ASA/lSOflash for the film both camera
Mode Shutter On-Camen Dial Setting2. and - Set Set to any mode. shutter to any speed except
B"
Set On-Flash Mode Selector3. to'Al or A2. For - best whenever flash performance. use Al
possible.
NOTE: The R-TTL position is for Ricoh cameras. lf
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used on Canon cameras, it will result in full
manual output of flash and will in no way
adversely affect your Canon camera.
4. Setting Lens f /stop
indicator past mintmum- f/stop.Set to green "A" or green
5. Turn flash on and when the ready light glows
shutter and f/stop are automatically set for flash.
Take the oicture.
Viewf 6. inder lnformation
is depressed halfway, shutter- Whenspeedshutterand f/stoprelease
that have been automatically set are displayed in
bottom of viewfinder.
7. Auto Exposure (AUTO Verification OK)
exposure is verified green by glowing "AUTO- AutoOK"
on the back of the flash. To activate the "AUTO
OK", take a flash picture or push the
"READY/TEST" BUTTON on the back of the
flash Check the "AUTO OK" immediately after
the flash fires lf no "AUTO OK" and using A2,
move closer to the subject or switch 10 Al. lf no
"AUTO OK" with A1, move closer to subject.

MANUAL OPERATION
For Manual Flash Outpuf, simply set Flash Mode
Selector to "M" Afler focusing, obtain subject
distance from lens barrel. Find this distance on
Manual f/stop/Distance Scale on the back of the
flash. Set your lens to the f /stop opposite the
distance. "AUTO OK" does not function when flash
is in the manual mode
CANON T-50 WITH 55OFD
(FLASH POWER SWITCH MUST BE IN THE OFF
POSITION BEFORE MOUNTING FLASH ON OR
REMOVTNG FROM CAMERA.)
AUTOMATIC OPERATION
1. Film Speed Sefttng the ASA/tSO for the - Set film in use on both camera flash. and

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2. On-Camen Mode and Shutter DialSetting - Set to "Program".
On-Flash3. Mode Selector
best flash performance, use- A1Setwheneverto A1 or A2. For
possible.
NOTE: The R-TTL position is for Ricoh cameras. Jf
used on Canon cameras, it will result in full
manual output of flash and will in no way
adversely affect your Canon camera.
Setting4. Lens f /stop
past indicator minimum- Setf/stop.to green "A" or green
5. Turn flash on and when the ready light glows
shutter and f/stop are automatically set for flash.
Take the picture.
Viewfinder6. lnformation
is depressed halfway, "P"- andWhenf shutterlightningreleasebolt
are displayed
(AUTO7. Auto Exposure Verification OKJ
green exposure is verified by glowing "AUTO- AutoOK"
on the back of the flash To activate the "AUTO
OK . take a flash picture or push the
"READY/TEST" BUTTON on the back of the
flash. Check the "AUTO OK" immediately after
the flash fires. lf no "AUTO OK" and using A2,
move closer to the subject or switch to A1 lf no
"AUTO OK' with A'1, move closer to subject.

MANUAL OPERATION
For Manual Flash Output, simply set Flash Mode
.Selector to "M". After focusing, obtain sublect
distance from lens barrel, Find this distance on
Manual f/stop/Distance Scale on the back of the
flash. Set your lens to the f /stop opposile the
distance. "AUTO OK" does not function when flash
is in the manual mode

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CANON T-70 WITH 55OFD
(FLASH POWER SWITCH MUST BE IN THE OFF
POSITION BEFORE MOUNTING FLASH ON OR
REMOVTNG FROM CAMERA.)
AUTOMATIC OPERATION
1. Film speed sefting the ASA/tso for the - Set film in use on both camera flash. and
2. On-Camen Mode and Shutter Dial Setting - Set to any mode,
On-Flash 3. Mode Selector
best flash performance, use- A1Setwheneverto 41 or A2. For
possible.
NOTE: The R-TTL position is for Ricoh cameras. lf
used on Canon cameras, it will result in full
manual output of flash and will in no way
adversely affect your Canon camera.
4. Setting Lens f /stop
indicator past minimum- f/stopSet to green "A" or green
5. Turn flash on and when the ready light glows
shutter and f/stop are automatrcally set for flash.
Take the picture.
Viewfinder 6. lnformation
is depressed- halfway, if lens- Whenset toshutter"A" or releasegreen
indicator past minimum f/stop, the automatic
f/stop is displayed along with a green lightning
bolt indicating flash ready. lf the lens is set to any
f/stop, a blinking red "M" will be displayed.
Exposure 7. Auto (AUTO Verification OK)
exposure is verif ied green by glowing 'AUTO- AutoO("
on the back of the flash. To activate the 'AUTO
OK", take a flash picture or push the
"READY/TEST' BUTTON on the back of the
flash. Check the 'AUTO OK" immediatelv after
the flash fires. lf no "AUTO OK" and using A2,
move ctoser to the subject or switch to A1. lf no
"AUTO OK' with A1, move closer to subiect.

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MANUAL OP€RATION
For Manual Flaih Outpuf, simply set Flash Mode
Selector 1o "M". After focusing, obtain subject
distance from lens barrel. Find this distance on
Manual f/stop/Distance Scale on the back of the
flash. Set your lens to the f /stop opposite the
distance. "AUTO OK" does not function when Jlash
is in the manual mode.
CANON T-80 WITH 55OFD
(FLASH POWER SWITCH MUST BE IN THE OFF
POSITION BEFORE MOUNTING FLASH ON OR
REMOVTNG FROM CAMERA.)

AUTOMATIC OPERATION
1. Film Speed the ASA/lSO Settlng for the - Set film in use on both camera flash. and
2. On-Camen Mode and Shutter Diat Setting - Set to any mode.
3 On-Flash Mode Selecfor Set to A1 or A2. For best flash performance. use- A1 whenever
possible.
NOTE: The R-TTL position is for Ricoh cameras. lf
used on Canon cameras, it will result in full
. manual outpul of flash and will in no way
adversely affect your Canon camera.
Setting 4. Lens f /stop
past indicator minimum- Setf/stop.to green "A" or green ..1
Viewfinder 5. lnformation
on and ready light is glowing,- Afterdepressflash theis turnedshutter i
release halfway. "P" and lightning bolt will appear,
indicating everything is automatrCally set and you
are ready for flash photography. Take the picture.
6. Auto Exposure (AUTO Verilication OK)
exposure is verified by glowing green 'AUTO- AutoOK"
on the back of the flash. To activate the "AUTO

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OK'. take a flash picture or push the
  "READY/TEST' BUTTON on the back of the
   flash Check the AUTO OK' rmmediately  after
   the flash fires  lf no "AUTO OK" and using A2.
  move closer to the subject or switch to A1. lf no
   AUTO OK with Al, move closer lo subiect.

MANUAL OPERATION
For Manual Flash Output, simply set Flash Mode
Seleclor 1o "M". After focusing, obtain subject
distance Jrom lens barrel Find this distance on
Manual f/stop/Distance Scale on the back of the
flash Set your lens to the  f /stop opposite the
distance. AUTO OK" does not function when flash
is in the manual mode. The viewfinder information
will change lrom "P" to 'M" when the f/stop ring on
the lens is set to an f/slop instead of the automatic
setting.

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 DESCRIPTION DES
 COMPOSANTS
   1. T6te du   f lash/Reflecteur
   2. Reflecteur orientable pour l'6clairage indirect
       (0', 45', 60o, 75o et 90")
   3. Sabot de montage avec roulette de blocage
   4. Senseur de lumiere (computer)
   5. Couvercle du logement des pileslaccus
   6, Echelle. des angles d'6clairage indirect
   7. Echelle des sensibilites ISO du film
   8. Fenetre d'rndication de la sensibilit6 du film
   9. Selecteur des sensibilit6s de film
 10. Fenelre d'indication de la portee en automatisme
  1 1. Selecteur du mode de fonctionnement
  12. Echelles des distances/diaphragmes en manuel
     '| 3. Bouton test/temoin de charge
  14. Temoin de bonne exposition en automatisme
 15. Interrupteur g6neral
  I6. Fenetre d'jndication des diaphragmes
     automatioues
 REMARQUE:
 Le flash 550FD est disponible en 3 moddles
  differents qui permettent  le couplage en automartsme
  inl6gral sur la plupart des appareils reflex les plus
 couranls. Les 3 modeles sont: le CR, pour les
 appareils Canon et Ricoh; le N, pour lous les
 modeles Nikon; et le MPO pour les appareils
 Minolta, Pentax et Olympus Assurez-vous que le
 moddle du 550FD que vous employez
 corresponde  i la marque de I'appareil dont vous
 vous servez.

CONCEPTION
 Le Vivjtar 550FD a ete congu pour permettre I'emploi
 le plus facile pour l'obtention des photos au flash de
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haute qualit6. Cette section du mode d'emploi est
 destinee d vous informer A prooos des fonctions de
 base de cet appareil. Des instructions detaillees
 relatives a l'emploi avec votre appareil photo
 particulier seront presentees a la fin de cette section
oe oase.
EMPLOI
Pour preparer  le flash pour son utilisation, prenez un
moment pour vous familiariser avec ses commandes
et indicateurs.  Veuillez vous rapporter a la page
contenant'la Description des Composants  et ddpliez
la page des figures (ir I'interieur de la couverture
avant). Localisez tous les organes de commande et
d'indication,  ainsi que les autres caracteristiques, afin
que vous purssiez les trouver facilement lorsqu'ils
sont cites dans le texte
Veuillez noter que le dos du 550FD est divise en 4
sections pour faciliter I'emploi du flash:
Section 1 : pour le reglage de la sensibilite du film
et contenant la fenetre d'indication de la sensibilite
du film (8) et le selecteur des sensibilites (9)
Section 2 : pour le fonctionnement automatique et
contenant la tenetre d'indication du diaphragme 41
ou A2 (16). la fenOtre d'indication de la portee en
automatisme  (10), et le selecteur du mode de
fonctionnement (1 1 ).
Section 3 : essentiellement pour le fonctionnement
en manuel et conlenant les 6chelles des
distances/diaphragme en manuel (12) Cette section
s'emploie aussi oendant le fonctionnement en TTL
pour indiquer la portee maximale d'exposition
automatique avec controle TTL.
Section 4 : contenant I'interrupteur g6n6ral (15), le
temoin de bonne eiposition (14), et le bouton
test/temoin de charge (13).
On peut oroc6der maintenant comme suit:
1. INSTALLEZ LES PILES/ACCUS
Ouvrez le couvercle du logement des piles/accus
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  (5) en le faisant glisser dans le sens de la fleche.
  Inserez qualre piles alcalines neuves. ou accus
 Cd.Ni. completement  charges, de taille AA, tout en
 vous       assurant que                      les                         indications                             de polarit6                             + et - correspondent                     reperes              aux                        des figures                                 a I'intdrieur
 du logement. Pressez les piles vers l'interieur et
 lermez le couvercle du logement                                                                                                        ,..tli
 2. MONTEZ LE FLASH
 SUR L'APPAREIL PHOTO
 IMPORTANT;
        Lors de monter ou retirer le flash de
          I'appareil,  il taut toujours mettre
         I'interrupteur g6neral en position 'OFF'
         (hors tension) afin de prevenir la
         possibilit6 d'endommager I'appareil photo.
 Faites glisser le sabot du flash'dans la griffe porte-
 accessoire de I'appareil photo. Faites tourner.la
 roulette moletee de blocage dans le sens de la
 fleche, pour assurer le montage solide sur I'appareil.
 3. METTEZ LE FLASH SOUS TENSION
 Faites glisser I'interrupteur g6neral (15) a la position
 'ON' pour mettre le flash sous tension Le lemorn oe
 charge (13) s'allumera lorsque le flash est pret a
 I'emploi
 4. CHOISISSEZ LA SENSIBILITE DU FILM
 Faites glisser le selecteur des sensrbilit6s de film (9)
 vers la droite ou vers la gauche, lusqu'd ce que la
 valeur affich6e dans la fenetre d'indication de la
 sensibilitd du film (8) corresponde a la sensibilite du
 film charge dans l'appareil photo. LE DEFAUT
 D'AFFICHER LA SENSIBILITE CORRECTE DU FILM
 PEUT ENGENDRER DES EXPOSITIONS
 INCORRECTES LORSQUE LE FLASH EST UTILISE
 SUR CERTAINS APPAREILS PHOTO A COUPLAGE
 D'AUTOMATIS[/E


z1

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5. CHOISISSEZ LE MODE DESIRE DE
 FONCTIONNEMENT DU FLASH
 Essayez les quatre positions du s6lecteur de mode
 de fonctionnement (1 1 ). Sur les positions A1 et A2,
 I'exposition automatique sera determin6e par le
 senseur (computer) du flash et une valeur de
 diaphragme apparaitra dans la fen6tre d'indication
 des diaphragmes  automatiques  (16). Reglez l'oblectif
 de I'appareil photo sur ce diaphragme. (Remarque:
 certains appareils photo peuvent effectuer
 automatiquement  ce reglage.) La portee
 corresporidante de l'6clair automatique  apparaitra
dans la fenetre d'indication de la oortee en
 automatisme  (10) et indiquera la gamme des
 drstances (en pieds et metres) auxquelles ce r6glage
permettra une bonne exposition.
Le reglage sur la position Al fournira la plage
 d'utilisation la plus grande, de 2 d 12 metres (de 6 d
40 pieds). avec toutefois un domaine de neltere
(profondeur de champ) relativement r6duit. Le
reglage sui A2 fournit une plage d'exposition
aulomatique s'etendant de 1 a 6 m. (3,20  pi.), qur
permet cependant un domarne de nettete plus
grande. Pour obtenir le temps de recyclage du flash
le plus rapide et la plus grande quantit6 d'eclairs par
jeu de piles, nous recommandons d'employer la
position Al dans le mesure possible. Bien entendu,   il
faut que votre objectif soit reglable au diaphragme
automatiq ue correspondant.
Lorsque le flash est 169le sur la position manuelle
"M  ',  il n'y a pas de commande automatique de
l'exposition  (utilisateurs des appareils Nikon: voyez
les instructions detailles) et la fenetre d'indication du
diaphragme automatique (16) ainsi que la fenelre
d'indication de la portee en automatisme (10) seront
vides. Cependant, l'echelle des
distances/diaphragmes en manuel (12) indiquera
une plage de diaphragmes entre les 6chelles oes
distances en pieds et mdtres. Pour utiliser cette
6chelle, calculez la distance flash-suiet et lisez le
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